All Questions
Tagged with calendar-computations algebra-precalculus
13
questions
-2
votes
1
answer
45
views
Calculating Recurring Work Schedule Off Days in a Given Month [closed]
I have a work schedule that uses a cycle like this:
Day 1: Morning shift
Day 2: Night shift
Day 3: Day off
Day 4: Morning shift
Day 5: Night shift
Days 6-8: 3 days off
Assuming today, May 4th is the ...
- 11
2
votes
1
answer
653
views
How can I find day of a certain month when the sum of all thursdays is a certain number?.
The problem is as follows:
The sum of all thursdays in certain month is $80$ and equal to the sum
of all sundays in the following month, which has the same number of
mondays than fridays it has ...
- 4,185
0
votes
3
answers
50
views
How can I find the a certain birthdate of two people when one information given depends on the other?
The problem is as follows:
Mike was born on $\textrm{October 1st, 2012,}$ and Jack on $\textrm{December 1st, 2013}$. Find the date when the triple the age of Jack is the double of Mike's age.
The ...
- 4,185
2
votes
3
answers
4k
views
How many years later the calendar of 2016 can be reused?
How many years later the calendar of 2016 can be reused?
I was asked this question in an exam. I want to explain the term 'reuse' . If we ignore the holidays and our only purpose is to check the date ...
- 3,401
0
votes
1
answer
131
views
"New Year falls more often on Sundays than on Mondays"
This is a question from a hungarian math contest from the year 1948.
It was Saturday on the 23rd October, 1948. Can one conclude that New Year falls more often on Sundays than on Mondays?
Well, I ...
- 4,794
5
votes
4
answers
3k
views
Why don't we subtract out / ignore the leap year every 128 years? [closed]
When we add the extra day to the calendar every 4 years it's to "correct" the calendar under the assumption that the year's length is 365.25 days. Every year, you're .25 days off, so after 4 years, ...
- 59
0
votes
0
answers
65
views
I want to know what not integer numbers means in calendar?
I want to know what not integer numbers means in this case?
if $30$ days $= 4$ weeks and $2$ days $4.2$
then why $20$ days does not correspond to $2$ weeks and $8$days $4,8$?
being that: $\frac{30}{...
- 109
2
votes
2
answers
75
views
How can I find the day of the week which an event happened after some time has elapsed?
The problem is as follows:
An astronomer discovers a new comet while scouting the skies on Monday
but decides to report his discovery $256$ days after. What day of the
week did the astronomer ...
- 4,185
0
votes
1
answer
113
views
Finding the initial day of the week (Calendars)
Number of Tuesdays in five consecutive calendar years taken together is exactly $260$. Which day of the week was $1st$ January of the first of these five years?
On the basis of given information the ...
- 571
2
votes
1
answer
602
views
How can one manually calculate the date conversion to the Hebrew calendar
There already are algorithms that can be used to concert a date from different calendars into the Julian Day Number (JDN) and a JDN into the Hebrew calendar.
But how can one calculate the conversion ...
- 137
1
vote
1
answer
66
views
What adjustments would be necessary to have a remainder of 0 associated with Sunday?
I was reading this below and I had a question:
Link
Take a look under "The Key Value Method" where it says "A remainder of 0 corresponds to Saturday, 1 means sunday, etc."
My ...
- 11
1
vote
1
answer
644
views
Why do you subtract 1 in a leap year if the date falls before March?
I was reading this below and I had a question:
Link
Take a look under "The Key Value Method" where it says "If your date is in January or February of a leap year, subtract 1."
I ...
- 11
2
votes
3
answers
122
views
Is there any fast way to get the number of a certain day in a week
I'm realy sorry, if this question is a bit stupid... But this is my first time on mathematics stackexchange.
Do you guys now for example, how to know the number of monday in a year?
- 23